<div style="margin: 20px; display: inline;">
  H265文件:
  <input type="file" #H265FileInput (change)="play(H265FileInput.files);">
</div>
<div style="margin-top: 10px; display: block; width: 540px; height: 360px; background-color: black;">
  <canvas id="playCanvas"></canvas>
</div>
  